Burnish ing-machine



(N0 Mod eli) W. 0. WAY.

BURNISHING MACHINE. No. 341,524. Patented May 11, 1886.

N, PETERS. Phaio-Lflhngnpher. Washington. D. c.

UNITED STATES PATENT OFFICE.

WILLIAM O. XVAY, OF NEVVINGTON, CONNECTICUT.

BURNISHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 341,524, dated May 11,1886.

Application filed February 4,1885. Serial No. 154,?67. (No model.) i

To aZZ whom it may concern.-

Be it known that I, WILLIAM 0. WAY, of Newington, in the county ofHartford and State of Connecticut, have invented a certain new anduseful' Improvement in Burnishing Machinery, of which the following is ade soription, reference being had to the accompanying drawings, whereFigure l is a top view of the parts wherein the improvement resides. Aspiral spring is omitted from the sleeve of one of the burnishstocks,for thepurpose of clearly showingthe barrel, and another of theburnish-stocks with its sleeve and burnish is sectioned for the pur'pose of showing interior construction. Fig. 2 is a side view of thedevice represented in Fig. 1. Fig. 3 is a front view of the parts shownin Fig. l, with the knife not present. Fig. 4 is an enlarged detailview, which may be called a side view, of one of the burnishstocks,sleeve thereon, and its burnish. Fig. 5 is what may be called a frontview of the parts shown in Fig. 4.

The mechanism herein described is intended for burnishing surfaces likethe sides of a knife-blade.

Themechanism shown in the annexed drawings is intended for burnishingboth sides of a knife-blade at the same time.

In order to make the operation of this present improvement intelligiblewithout present ing an undue number of drawings, I will refer briefly tocertain prior patents of mine.

Letters Patent to myself for burnishing machinery, No. 235,921, datedDecember 28, 1880, show a machine of a general nature suitable for usein connection with this present improvement. Such machine embodies areciprocating cross-head carrying pivoted burnisher-bearing arms. Thecross-head shown in the drawings of this present patent is intended tobe reoiprocated in substantially the same manner as the cross-head isreciprocated in themachine of said Patent No. 235,921.

Letters Patent to me, N 0. 293,826, dated February 19, 1884, show animproved crosshead more nearly approximating to my pres ent improvementthan-the one shown in my said Patent No. 235, 921. My said later PatentNo. 293,826 also shows a device for grasping and holding a knife by thehandle while the blade is being burnished, and the use of my presentimprovement contemplates the use of such a knileholding device or somepractical equivalent thereof.

The machine shown in my said later patent is designed for burnishing thesides of a knifeblade. Its commonest use is for burnishing the sides ofa steel knife-blade electroplated with silver.

The most obvious mode of using the device shown in my said later patentis to'have the burnishers make a stroke substantially the full length ofthe blade; but in so using that machine there is a tendency at times tocause the silverplating to strip. That difliculty is entirely cured inthe use of the present improvement.

In the accompanying drawings, the letter a denotes a cross-head having apintle, b, for insertion into the end of such a reciprocating piston asis shown in my said Patent No. 235,921, whereby the burnishers will begiven the rapid horizontal and the slow vertical reciprocation necessaryto make them cover the whole surface to be burnished.

The letter 0 denotes two similar burnishen bearing arms pivoted in thecross-head. Each of these arms 0 is provided with a rotarilyhungwheel-burnisher, d, fixed to the arm. The arms 0 are pressed inward bythe helical springs e, which abut at the outer end against arms f,extending from and wholly supported by the cross-head. The armsf extendalongside and back of the arms 0.

The letter 2 denotes adj llStlllg-SCIGWS jointed tothearms c. j denotesthumb nuts thereon, by which the arms 0 may be regulated as to theamount of their permissible inward play. By unscrewing the nuts j thesprings e are permitted to push the arms a inward, and by screwing upthe nuts j the arms 0 are pulled outward or apart.

The arms f are not absolutely rigid, but are stiff enough to bepractically rigid, so far as any function hereinbefore ascribed to themis concerned.

It has already been mentioned that each of the arms 0 bears arotarily-hung wheel-burnisher fixed thereto. Each of these arms 0 alsobears aseries of independently-acting burnishers set in the samehorizontal line, and the length of the stroke given them is such thatthe path of each overlaps the path of its next neighbor. When it is saidthat each of these series of burnishers is independently acting, it ismeant that they are movable with reference to the arms c,and that eachis pressed inward to its work by aseparate spring of its own. Theseseries of independently-acting burnishers are denoted by the letter'o.Each of them is rotarily hung in a sleeve or socket, s, which issupported on a stock or stud, is, screwed into an arm, 0. A spiralspring, Z, interposed between arm 0 and a shoulder on the socket, urgeseach burnisher o independently' to its work. Each burnisher 0 extendsback into a mortise, m, in the end of stud k.

It will be observed that the front ends of the arms f are rounded off onthe inside into curved surfaces. These curved surfaces are cams whichco-operate with stationary posts in the manner shown in my said PatentNo. 293,826, to turn the burnishers d suddenly outward at the propertime, with a curved movement corresponding with the curve by which theblade of the knife rises to meet the bolster, the armsf beingsufficiently elastic to permit this action.

I claim as my improvement-- 1. The combination, in a burnishingmachine,of a reciprocating arm or bar, carrying a series of studs, a series ofsockets on said studs, each socket carrying its own burnisher, and aspring upon each socket arranged to force the burnisher toward thesurface to be operated upon, all substantially as described, and for thepurpose set forth.

2. In combination, in a burnishing machine, a reciprocating arm, 0,pressed toward the work by a spring, a burnisher, d, fixed in itsrelation to said arm, and a series of independently -acting burnishers,0, all substantially as described, and for the purpose set forth.

3. In combination, the' cross head a, the pivoted arms 0, the spiralsprings c, the arms f,wholly supported against the outward pressure ofsaid springs by said crosshead, and the two series ofindependentlyacting burnishers 0,borne on the arms cand provided withseparate spring action, all substantially as de scribed, and for thepurpose set forth.

4. In combination, the cross-head a, the pivoted arms 0, bearing'thefixed burnishers d, the spiral springs e, the arms f, wholly supportedagainst the outward pressure of said springs by said cross-head, and thetwo series of independentlyacting burnishers 0, borne on the arms 0 andprovided with separate spring action, all substantially as described,and for the purpose set forth.

WILLIAM O. XVAY.

WVitnesses:

A. C. TANNER, H. Ii. \VILLLius.

